| Location of appearance | Title | Character | Gender | Age | Hair Color | Hair direction / style | Features |
| Near Bardsley Garden | Detective | Hercule Poirot | M | 50+ | Dark | Thinning | |
| Near Bardsley Garden | Captain | Hastings | M | 50+ | Grey | ||
| Near Bardsley Garden | Chief Inspector | James Japp | M | 50+ | Brown | ||
| Whitehaven Mansions | Miss | Felicity Lemon | F | 40+ | Orange | ||
| Next day | |||||||
| Referred by Miss Lemon | Dentist | 11.00 appointment for Poirot | |||||
| Referred by Japp | Barbara Allen | F | 30+ | Blonde | Died 23:30 last night. Met Jane in India. Widow. Re-engaged to Charles | ||
| Referred by Japp | Photographer | Jane Plenderleith | F | 30+ | Dark burgundy | Curly | |
| Bardsley Garden Mews | Inspector | Jameson | M | 40+ | Dark | Back right combed | Moustache |
| Referred by Jane | Member of Parliament | Charles Laverton-West | M | 30+ | Dark | Right combed, slick | Engaged to Barbara |
| Bardsley Garden Street | Fred (Freddie) Hogg | M | 10+ | Dark Brown | Straight | ||
| Referred by Fred | Major | Robert Erskin Eustace | M | 45+ | Dark | Balding | "Military looking and moustache". Knew Barbara Allen from India |
| Bardsley Garden Doorway | House keeper | Pierce | F | 60+ | Grey | Wavy | Jane's maid |
| Main locations | Info |
| Near Bardsley Garden Guy Fawkes Night | November 5th celebration that King James 1 was not assassinated in 1605 |
| Bardsley Garden Mews | Mews = stable/living quarters, or retirement home |
| Whitehaven Mansions | Poirot's home & office |